pi
英 [paɪ]
美 [paɪ]
n. 圆周率; 希腊字母表的第16个字母
复数：pis
BNC.8364 / COCA.18727
牛津词典
noun
- 圆周率
the symbol π used to show the ratio of the circumference of (= distance around) a circle to its diameter (= distance across), that is about 3.14159 - 希腊字母表的第16个字母
the 16th letter of the Greek alphabet (Π, π)
柯林斯词典
- 圆周率（通常用希腊字母�表示，近似值为3.142）
Piis a number, approximately 3.142, which is equal to the distance round a circle divided by its width. It is usually represented by the Greek letter �.
英英释义
noun
- the 16th letter of the Greek alphabet
- the ratio of the circumference to the diameter of a circle
双语例句
- Predictive voltage feedback PI controller with feedforward voltage compensator is adopted as the controlled method of the inverter system.
针对在光伏并网系统中采用单纯PI控制的缺点，提出了增加电网电压前馈控制来改善并网电流波形。 - I advocated pi calculus channels because of their simplicity, which generally translates to performance and maintainability.
我提倡使用pi演算通道是由于它的简单性，换句话说是由于它的高效性和可维护性。 - In our self-Oscillation drive system, the stable error of the oscillation amplitude is eliminated by the PI controller.
在该闭环驱动系统中，通过引入PI控制器消除了振动幅度控制的稳态误差。 - We want to discuss sigma bonds and pi bonds.
我们要讨论sigma键和π键。 - Considering the characteristics of PMSM, a fuzzy-PI control method based on the fuzzy decision and relay self-tuning was proposed.
针对永磁同步电机的特点，提出了基于模糊决策和继电自整定的模糊PI控制方法。 - PI controller is widely used in wind turbine control system and its parameters need to be identified.
风电机组控制系统中PI控制器较多，需要辨识各PI控制器的参数。 - However, PI and square root are a bit more common.
然而，PI和平方根比较常见。 - The design of nonlinear PID and PI attitude-controller for a flexible spacecraft
挠性航天器的非线性PID和PI姿态控制器设计 - The inner loop adopts PI algorithm and the outer loop adopts a time optimal self-tuning PID algorithm.
伺服控制器分别采用有源PI校正和时间最小参数自调整PID控制算法。 - Research of fuzzy PI control of dual-motors driving servo system
双电机驱动伺服系统的模糊PI控制研究